Improvement in paper-ruling- machines



W. 0. HIGKOK. PAPER RULING 1111111111115.

No. 104,152. Patented June 14. 1870.

WILLIAM O. HIOKOK, OF HARRISBURG, PENNSYLVANIA.

Lctterslctent No. 104,152, dated June 14, 1870.

IMPROVEMENT IN PAPER-RULING MACHINES.

The Schedule referreito in these Letters Patent and making part of the same.

I, WILLIAM 0. Bronx, county of Dauphin and-State of Pennsylvania, have invented certain Improvements in the Pen-Clamps of Paper-Ruling Machines, of which the -following'is a specification.

Nature and Objects of thcliwentz'onl My invention relates tothe combined arrangement of a slendercyliudrical stripicf elastic gum, or other similarl y elastic material, in a groove made for the purpose in one of the jaws of the clamp along, parallel to, and at a shortdistance from the outer edge that the said strip will fit tightly in said groove, and present a convex surface a little above the plane of the' jaw the object of my invention being to obviate the difliculty which arises from any slight. seasoningchanges in the wood of which the clamps are made, and from their wearing away, as well as such as arise from differences in the thickness of the sheet-metal of which the heads of the pens are made.

Description of Accompanying Drawing. Figure 1 is atrausverse section of a pen-clamp for a paper-ruling machine, embodying my invention.

Figure 2 is a plan view of the inner side of the upper jaw'of the clamp. v

Figure 3 is a plan view of the inner side of the lower jaw of the clamp.

General Description.

of Harrisburg, in the of the said jaw, so p a groove, D, along near its outer edge, and insert firmly therein a cylindrical strip of gum-elastic, E, so that the'upper side of the said elastic (strip will form a cushion, the upper side of which will he a little above the surface-plane of the jaw. I It will be readily understood, that, when the tw jaws a and l) of the clamp are compressed together, with the head-plates of a series of pens between, all

the said head-plates will be compressed with sufiicient' uniformity to retain them in their proper adjusted positions, notwithstanding the usual variations in' the thickness of themet'al out of which the head-plates are made, and that any slight variation in the wood of the clamp from seasoning or wear will also be provided for, I

It will also be understood that, as the projecting top surface of the elastic strip is convex, the head-plates of the pens can be readily slipped in and out without requiring more than a slight lessening of the pressure of the clamps. r

I wish it to be understood that I do not intend to confine my invention to the use of gum-elastic for the cushion E, as other elastic substances maybe used.

Claim.

I claim as my invention- The cylindrical elastic strip E, and the groove D,

when combined together and arranged in relation to Y the jaws a b of the pen-clamp of a paper-ruling niachine, substantially as aud for the purpose hereinbefore set forth.

\Vitnesses: W. O. HIOKOK.

E. H. HICKOK,

S. Sousrvnai 

